// Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import '../experiments/flags.dart';
import '../messages/codes.dart';
import '../scanner/scanner.dart';
import 'parser.dart';

class ForwardingListener implements Listener {
  Listener? listener;
  bool forwardErrors = true;

  ForwardingListener([this.listener]);

  @override
  void beginAnonymousMethodInvocation(Token token) {
    listener?.beginAnonymousMethodInvocation(token);
  }

  @override
  void beginArguments(Token token) {
    listener?.beginArguments(token);
  }

  @override
  void beginAssert(Token assertKeyword, Assert kind) {
    listener?.beginAssert(assertKeyword, kind);
  }

  @override
  void beginAwaitExpression(Token token) {
    listener?.beginAwaitExpression(token);
  }

  @override
  void beginBinaryExpression(Token token) {
    listener?.beginBinaryExpression(token);
  }

  @override
  void beginBinaryPattern(Token token) {
    listener?.beginBinaryPattern(token);
  }

  @override
  void beginBlock(Token token, BlockKind blockKind) {
    listener?.beginBlock(token, blockKind);
  }

  @override
  void beginBlockFunctionBody(Token token) {
    listener?.beginBlockFunctionBody(token);
  }

  @override
  void beginCascade(Token token) {
    listener?.beginCascade(token);
  }

  @override
  void beginCaseExpression(Token caseKeyword) {
    listener?.beginCaseExpression(caseKeyword);
  }

  @override
  void beginCatchClause(Token token) {
    listener?.beginCatchClause(token);
  }

  @override
  void beginClassDeclaration(
    Token begin,
    Token? abstractToken,
    Token? macroToken,
    Token? sealedToken,
    Token? baseToken,
    Token? interfaceToken,
    Token? finalToken,
    Token? augmentToken,
    Token? mixinToken,
    Token name,
  ) {
    listener?.beginClassDeclaration(
      begin,
      abstractToken,
      macroToken,
      sealedToken,
      baseToken,
      interfaceToken,
      finalToken,
      augmentToken,
      mixinToken,
      name,
    );
  }

  @override
  void beginClassOrMixinOrExtensionBody(DeclarationKind kind, Token token) {
    listener?.beginClassOrMixinOrExtensionBody(kind, token);
  }

  @override
  void beginClassOrMixinOrNamedMixinApplicationPrelude(Token token) {
    listener?.beginClassOrMixinOrNamedMixinApplicationPrelude(token);
  }

  @override
  void beginCombinators(Token token) {
    listener?.beginCombinators(token);
  }

  @override
  void beginCompilationUnit(Token token) {
    listener?.beginCompilationUnit(token);
  }

  @override
  void beginConditionalExpression(Token question) {
    listener?.beginConditionalExpression(question);
  }

  @override
  void beginConditionalUri(Token ifKeyword) {
    listener?.beginConditionalUri(ifKeyword);
  }

  @override
  void beginConditionalUris(Token token) {
    listener?.beginConditionalUris(token);
  }

  @override
  void beginConstExpression(Token constKeyword) {
    listener?.beginConstExpression(constKeyword);
  }

  @override
  void beginConstLiteral(Token token) {
    listener?.beginConstLiteral(token);
  }

  @override
  void beginConstructor(
    DeclarationKind declarationKind,
    Token? augmentToken,
    Token? externalToken,
    Token? staticToken,
    Token? covariantToken,
    Token? varFinalOrConst,
    Token? getOrSet,
    Token? newToken,
    Token name,
    String? enclosingDeclarationName,
  ) {
    listener?.beginConstructor(
      declarationKind,
      augmentToken,
      externalToken,
      staticToken,
      covariantToken,
      varFinalOrConst,
      getOrSet,
      newToken,
      name,
      enclosingDeclarationName,
    );
  }

  @override
  void beginConstructorReference(Token start) {
    listener?.beginConstructorReference(start);
  }

  @override
  void beginDoWhileStatement(Token token) {
    listener?.beginDoWhileStatement(token);
  }

  @override
  void beginDoWhileStatementBody(Token token) {
    listener?.beginDoWhileStatementBody(token);
  }

  @override
  void beginElseStatement(Token token) {
    listener?.beginElseStatement(token);
  }

  @override
  void beginEnumDeclaration(
    Token beginToken,
    Token? augmentToken,
    Token enumKeyword,
    Token name,
  ) {
    listener?.beginEnumDeclaration(beginToken, augmentToken, enumKeyword, name);
  }

  @override
  void beginEnumDeclarationPrelude(Token enumKeyword) {
    listener?.beginEnumDeclarationPrelude(enumKeyword);
  }

  @override
  void beginExport(Token token) {
    listener?.beginExport(token);
  }

  @override
  void beginUncategorizedTopLevelDeclaration(Token token) {
    listener?.beginUncategorizedTopLevelDeclaration(token);
  }

  @override
  void beginExtensionDeclarationPrelude(Token extensionKeyword) {
    listener?.beginExtensionDeclarationPrelude(extensionKeyword);
  }

  @override
  void beginExtensionDeclaration(
    Token? augmentToken,
    Token extensionKeyword,
    Token? name,
  ) {
    listener?.beginExtensionDeclaration(augmentToken, extensionKeyword, name);
  }

  @override
  void beginFactory(
    DeclarationKind declarationKind,
    Token lastConsumed,
    Token? externalToken,
    Token? constToken,
  ) {
    listener?.beginFactory(
      declarationKind,
      lastConsumed,
      externalToken,
      constToken,
    );
  }

  @override
  void beginFieldInitializer(Token token) {
    listener?.beginFieldInitializer(token);
  }

  @override
  void beginForControlFlow(Token? awaitToken, Token forToken) {
    listener?.beginForControlFlow(awaitToken, forToken);
  }

  @override
  void beginForInBody(Token token) {
    listener?.beginForInBody(token);
  }

  @override
  void beginForInExpression(Token token) {
    listener?.beginForInExpression(token);
  }

  @override
  void beginFormalParameter(
    Token token,
    MemberKind kind,
    Token? requiredToken,
    Token? covariantToken,
    Token? varFinalOrConst,
  ) {
    listener?.beginFormalParameter(
      token,
      kind,
      requiredToken,
      covariantToken,
      varFinalOrConst,
    );
  }

  @override
  void beginFormalParameterDefaultValueExpression() {
    listener?.beginFormalParameterDefaultValueExpression();
  }

  @override
  void beginFormalParameters(Token token, MemberKind kind) {
    listener?.beginFormalParameters(token, kind);
  }

  @override
  void beginForStatement(Token token) {
    listener?.beginForStatement(token);
  }

  @override
  void beginForStatementBody(Token token) {
    listener?.beginForStatementBody(token);
  }

  @override
  void beginFunctionExpression(Token token) {
    listener?.beginFunctionExpression(token);
  }

  @override
  void beginFunctionName(Token token) {
    listener?.beginFunctionName(token);
  }

  @override
  void beginRecordType(Token leftBracket) {
    listener?.beginRecordType(leftBracket);
  }

  @override
  void endRecordType(
    Token leftBracket,
    Token? questionMark,
    int count,
    bool hasNamedFields,
  ) {
    listener?.endRecordType(leftBracket, questionMark, count, hasNamedFields);
  }

  @override
  void beginRecordTypeEntry() {
    listener?.beginRecordTypeEntry();
  }

  @override
  void endRecordTypeEntry() {
    listener?.endRecordTypeEntry();
  }

  @override
  void beginRecordTypeNamedFields(Token leftBracket) {
    listener?.beginRecordTypeNamedFields(leftBracket);
  }

  @override
  void endRecordTypeNamedFields(int count, Token leftBracket) {
    listener?.endRecordTypeNamedFields(count, leftBracket);
  }

  @override
  void beginFunctionType(Token beginToken) {
    listener?.beginFunctionType(beginToken);
  }

  @override
  void beginTypedef(Token token) {
    listener?.beginTypedef(token);
  }

  @override
  void beginFunctionTypedFormalParameter(Token token) {
    listener?.beginFunctionTypedFormalParameter(token);
  }

  @override
  void beginHide(Token hideKeyword) {
    listener?.beginHide(hideKeyword);
  }

  @override
  void beginIfControlFlow(Token ifToken) {
    listener?.beginIfControlFlow(ifToken);
  }

  @override
  void beginIfStatement(Token token) {
    listener?.beginIfStatement(token);
  }

  @override
  void beginImplicitCreationExpression(Token token) {
    listener?.beginImplicitCreationExpression(token);
  }

  @override
  void beginImport(Token importKeyword) {
    listener?.beginImport(importKeyword);
  }

  @override
  void beginInitializedIdentifier(Token token) {
    listener?.beginInitializedIdentifier(token);
  }

  @override
  void beginInitializer(Token token) {
    listener?.beginInitializer(token);
  }

  @override
  void beginInitializers(Token token) {
    listener?.beginInitializers(token);
  }

  @override
  void beginLabeledStatement(Token token, int labelCount) {
    listener?.beginLabeledStatement(token, labelCount);
  }

  @override
  void beginLibraryAugmentation(Token augmentKeyword, Token libraryKeyword) {
    listener?.beginLibraryAugmentation(augmentKeyword, libraryKeyword);
  }

  @override
  void endLibraryAugmentation(
    Token augmentKeyword,
    Token libraryKeyword,
    Token semicolon,
  ) {
    listener?.endLibraryAugmentation(augmentKeyword, libraryKeyword, semicolon);
  }

  @override
  void beginLibraryName(Token token) {
    listener?.beginLibraryName(token);
  }

  @override
  void beginLiteralString(Token token) {
    listener?.beginLiteralString(token);
  }

  @override
  void beginLiteralSymbol(Token token) {
    listener?.beginLiteralSymbol(token);
  }

  @override
  void beginLocalFunctionDeclaration(Token token) {
    listener?.beginLocalFunctionDeclaration(token);
  }

  @override
  void beginMember() {
    listener?.beginMember();
  }

  @override
  void beginMetadata(Token token) {
    listener?.beginMetadata(token);
  }

  @override
  void beginMetadataStar(Token token) {
    listener?.beginMetadataStar(token);
  }

  @override
  void beginMethod(
    DeclarationKind declarationKind,
    Token? augmentToken,
    Token? externalToken,
    Token? staticToken,
    Token? covariantToken,
    Token? varFinalOrConst,
    Token? getOrSet,
    Token name,
    String? enclosingDeclarationName,
  ) {
    listener?.beginMethod(
      declarationKind,
      augmentToken,
      externalToken,
      staticToken,
      covariantToken,
      varFinalOrConst,
      getOrSet,
      name,
      enclosingDeclarationName,
    );
  }

  @override
  void beginMixinDeclaration(
    Token beginToken,
    Token? augmentToken,
    Token? baseToken,
    Token mixinKeyword,
    Token name,
  ) {
    listener?.beginMixinDeclaration(
      beginToken,
      augmentToken,
      baseToken,
      mixinKeyword,
      name,
    );
  }

  @override
  void beginNamedFunctionExpression(Token token) {
    listener?.beginNamedFunctionExpression(token);
  }

  @override
  void beginNamedMixinApplication(
    Token beginToken,
    Token? abstractToken,
    Token? macroToken,
    Token? sealedToken,
    Token? baseToken,
    Token? interfaceToken,
    Token? finalToken,
    Token? augmentToken,
    Token? mixinToken,
    Token name,
  ) {
    listener?.beginNamedMixinApplication(
      beginToken,
      abstractToken,
      macroToken,
      sealedToken,
      baseToken,
      interfaceToken,
      finalToken,
      augmentToken,
      mixinToken,
      name,
    );
  }

  @override
  void beginNewExpression(Token token) {
    listener?.beginNewExpression(token);
  }

  @override
  void beginOptionalFormalParameters(Token token) {
    listener?.beginOptionalFormalParameters(token);
  }

  @override
  void beginPart(Token token) {
    listener?.beginPart(token);
  }

  @override
  void beginPartOf(Token token) {
    listener?.beginPartOf(token);
  }

  @override
  void beginRedirectingFactoryBody(Token token) {
    listener?.beginRedirectingFactoryBody(token);
  }

  @override
  void beginRethrowStatement(Token token) {
    listener?.beginRethrowStatement(token);
  }

  @override
  void beginReturnStatement(Token token) {
    listener?.beginReturnStatement(token);
  }

  @override
  void beginShow(Token showKeyword) {
    listener?.beginShow(showKeyword);
  }

  @override
  void beginSwitchBlock(Token token) {
    listener?.beginSwitchBlock(token);
  }

  @override
  void beginSwitchExpressionBlock(Token token) {
    listener?.beginSwitchExpressionBlock(token);
  }

  @override
  void beginSwitchCase(int labelCount, int expressionCount, Token beginToken) {
    listener?.beginSwitchCase(labelCount, expressionCount, beginToken);
  }

  @override
  void beginSwitchExpressionCase() {
    listener?.beginSwitchExpressionCase();
  }

  @override
  void beginSwitchStatement(Token token) {
    listener?.beginSwitchStatement(token);
  }

  @override
  void beginSwitchExpression(Token token) {
    listener?.beginSwitchExpression(token);
  }

  @override
  void handleThenControlFlow(Token token) {
    listener?.handleThenControlFlow(token);
  }

  @override
  void beginThenStatement(Token token) {
    listener?.beginThenStatement(token);
  }

  @override
  void beginTopLevelMember(Token token) {
    listener?.beginTopLevelMember(token);
  }

  @override
  void beginTopLevelMethod(
    Token lastConsumed,
    Token? augmentToken,
    Token? externalToken,
  ) {
    listener?.beginTopLevelMethod(lastConsumed, augmentToken, externalToken);
  }

  @override
  void beginTryStatement(Token token) {
    listener?.beginTryStatement(token);
  }

  @override
  void beginTypeArguments(Token token) {
    listener?.beginTypeArguments(token);
  }

  @override
  void beginTypeList(Token token) {
    listener?.beginTypeList(token);
  }

  @override
  void beginTypeVariable(Token token) {
    listener?.beginTypeVariable(token);
  }

  @override
  void beginTypeVariables(Token token) {
    listener?.beginTypeVariables(token);
  }

  @override
  void beginVariableInitializer(Token token) {
    listener?.beginVariableInitializer(token);
  }

  @override
  void beginVariablesDeclaration(
    Token token,
    Token? lateToken,
    Token? varFinalOrConst,
  ) {
    listener?.beginVariablesDeclaration(token, lateToken, varFinalOrConst);
  }

  @override
  void beginWhileStatement(Token token) {
    listener?.beginWhileStatement(token);
  }

  @override
  void beginWhileStatementBody(Token token) {
    listener?.beginWhileStatementBody(token);
  }

  @override
  void beginYieldStatement(Token token) {
    listener?.beginYieldStatement(token);
  }

  @override
  void endArguments(int count, Token beginToken, Token endToken) {
    listener?.endArguments(count, beginToken, endToken);
  }

  @override
  void handleObjectPatternFields(int count, Token beginToken, Token endToken) {
    listener?.handleObjectPatternFields(count, beginToken, endToken);
  }

  @override
  void endAssert(
    Token assertKeyword,
    Assert kind,
    Token leftParenthesis,
    Token? commaToken,
    Token endToken,
  ) {
    listener?.endAssert(
      assertKeyword,
      kind,
      leftParenthesis,
      commaToken,
      endToken,
    );
  }

  @override
  void endAwaitExpression(Token beginToken, Token endToken) {
    listener?.endAwaitExpression(beginToken, endToken);
  }

  @override
  void endBinaryExpression(Token token, Token endToken) {
    listener?.endBinaryExpression(token, endToken);
  }

  @override
  void endBinaryPattern(Token token) {
    listener?.endBinaryPattern(token);
  }

  @override
  void handleDotAccess(Token token, Token endToken, bool isNullAware) {
    listener?.handleDotAccess(token, endToken, isNullAware);
  }

  @override
  void handleCascadeAccess(Token token, Token endToken, bool isNullAware) {
    listener?.handleCascadeAccess(token, endToken, isNullAware);
  }

  @override
  void endBlock(
    int count,
    Token beginToken,
    Token endToken,
    BlockKind blockKind,
  ) {
    listener?.endBlock(count, beginToken, endToken, blockKind);
  }

  @override
  void endBlockFunctionBody(int count, Token beginToken, Token endToken) {
    listener?.endBlockFunctionBody(count, beginToken, endToken);
  }

  @override
  void endCascade() {
    listener?.endCascade();
  }

  @override
  void endCaseExpression(Token caseKeyword, Token? when, Token colon) {
    listener?.endCaseExpression(caseKeyword, when, colon);
  }

  @override
  void endCatchClause(Token token) {
    listener?.endCatchClause(token);
  }

  @override
  void endConstructor(
    DeclarationKind kind,
    Token beginToken,
    Token? newToken,
    Token beginParam,
    Token? beginInitializers,
    Token endToken,
  ) {
    listener?.endConstructor(
      kind,
      beginToken,
      newToken,
      beginParam,
      beginInitializers,
      endToken,
    );
  }

  @override
  void endClassDeclaration(Token beginToken, Token endToken) {
    listener?.endClassDeclaration(beginToken, endToken);
  }

  @override
  void endFactory(
    DeclarationKind kind,
    Token beginToken,
    Token factoryKeyword,
    Token endToken,
  ) {
    listener?.endFactory(kind, beginToken, factoryKeyword, endToken);
  }

  @override
  void endFields(
    DeclarationKind kind,
    Token? abstractToken,
    Token? augmentToken,
    Token? externalToken,
    Token? staticToken,
    Token? covariantToken,
    Token? lateToken,
    Token? varFinalOrConst,
    int count,
    Token beginToken,
    Token endToken,
  ) {
    listener?.endFields(
      kind,
      abstractToken,
      augmentToken,
      externalToken,
      staticToken,
      covariantToken,
      lateToken,
      varFinalOrConst,
      count,
      beginToken,
      endToken,
    );
  }

  @override
  void endMethod(
    DeclarationKind kind,
    Token? getOrSet,
    Token beginToken,
    Token beginParam,
    Token? beginInitializers,
    Token endToken,
  ) {
    listener?.endMethod(
      kind,
      getOrSet,
      beginToken,
      beginParam,
      beginInitializers,
      endToken,
    );
  }

  @override
  void endClassOrMixinOrExtensionBody(
    DeclarationKind kind,
    int memberCount,
    Token beginToken,
    Token endToken,
  ) {
    listener?.endClassOrMixinOrExtensionBody(
      kind,
      memberCount,
      beginToken,
      endToken,
    );
  }

  @override
  void endCombinators(int count) {
    listener?.endCombinators(count);
  }

  @override
  void endCompilationUnit(int count, Token token) {
    listener?.endCompilationUnit(count, token);
  }

  @override
  void endConditionalExpression(Token question, Token colon, Token endToken) {
    listener?.endConditionalExpression(question, colon, endToken);
  }

  @override
  void endConditionalUri(Token ifKeyword, Token leftParen, Token? equalSign) {
    listener?.endConditionalUri(ifKeyword, leftParen, equalSign);
  }

  @override
  void endConditionalUris(int count) {
    listener?.endConditionalUris(count);
  }

  @override
  void endConstExpression(Token token) {
    listener?.endConstExpression(token);
  }

  @override
  void endConstLiteral(Token endToken) {
    listener?.endConstLiteral(endToken);
  }

  @override
  void endConstructorReference(
    Token start,
    Token? periodBeforeName,
    Token endToken,
    ConstructorReferenceContext constructorReferenceContext,
  ) {
    listener?.endConstructorReference(
      start,
      periodBeforeName,
      endToken,
      constructorReferenceContext,
    );
  }

  @override
  void endDoWhileStatement(
    Token doKeyword,
    Token whileKeyword,
    Token endToken,
  ) {
    listener?.endDoWhileStatement(doKeyword, whileKeyword, endToken);
  }

  @override
  void endDoWhileStatementBody(Token token) {
    listener?.endDoWhileStatementBody(token);
  }

  @override
  void endElseStatement(Token beginToken, Token endToken) {
    listener?.endElseStatement(beginToken, endToken);
  }

  @override
  void endEnumDeclaration(
    Token beginToken,
    Token enumKeyword,
    Token leftBrace,
    int memberCount,
    Token endToken,
  ) {
    listener?.endEnumDeclaration(
      beginToken,
      enumKeyword,
      leftBrace,
      memberCount,
      endToken,
    );
  }

  @override
  void handleEnumElement(Token beginToken, Token? augmentToken) {
    listener?.handleEnumElement(beginToken, augmentToken);
  }

  @override
  void handleEnumElements(Token elementsEndToken, int elementsCount) {
    listener?.handleEnumElements(elementsEndToken, elementsCount);
  }

  @override
  void handleEnumHeader(
    Token? augmentToken,
    Token enumKeyword,
    Token leftBrace,
  ) {
    listener?.handleEnumHeader(augmentToken, enumKeyword, leftBrace);
  }

  @override
  void beginEnumBody(Token token) {
    listener?.beginEnumBody(token);
  }

  @override
  void endEnumBody(Token beginToken, Token endToken) {
    listener?.endEnumBody(beginToken, endToken);
  }

  @override
  void endExport(Token exportKeyword, Token semicolon) {
    listener?.endExport(exportKeyword, semicolon);
  }

  @override
  void endExtensionDeclaration(
    Token beginToken,
    Token extensionKeyword,
    Token? onKeyword,
    Token endToken,
  ) {
    listener?.endExtensionDeclaration(
      beginToken,
      extensionKeyword,
      onKeyword,
      endToken,
    );
  }

  @override
  void endFieldInitializer(Token assignment, Token endToken) {
    listener?.endFieldInitializer(assignment, endToken);
  }

  @override
  void endForControlFlow(Token token) {
    listener?.endForControlFlow(token);
  }

  @override
  void endForIn(Token endToken) {
    listener?.endForIn(endToken);
  }

  @override
  void endForInBody(Token endToken) {
    listener?.endForInBody(endToken);
  }

  @override
  void endForInControlFlow(Token token) {
    listener?.endForInControlFlow(token);
  }

  @override
  void endForInExpression(Token token) {
    listener?.endForInExpression(token);
  }

  @override
  void endFormalParameter(
    Token? varOrFinal,
    Token? thisKeyword,
    Token? superKeyword,
    Token? periodAfterThisOrSuper,
    Token nameToken,
    Token? initializerStart,
    Token? initializerEnd,
    FormalParameterKind kind,
    MemberKind memberKind,
  ) {
    listener?.endFormalParameter(
      varOrFinal,
      thisKeyword,
      superKeyword,
      periodAfterThisOrSuper,
      nameToken,
      initializerStart,
      initializerEnd,
      kind,
      memberKind,
    );
  }

  @override
  void endFormalParameterDefaultValueExpression() {
    listener?.endFormalParameterDefaultValueExpression();
  }

  @override
  void endFormalParameters(
    int count,
    Token beginToken,
    Token endToken,
    MemberKind kind,
  ) {
    listener?.endFormalParameters(count, beginToken, endToken, kind);
  }

  @override
  void endForStatement(Token endToken) {
    listener?.endForStatement(endToken);
  }

  @override
  void endForStatementBody(Token endToken) {
    listener?.endForStatementBody(endToken);
  }

  @override
  void endFunctionExpression(Token beginToken, Token endToken) {
    listener?.endFunctionExpression(beginToken, endToken);
  }

  @override
  void endFunctionName(
    Token beginToken,
    Token token,
    bool isFunctionExpression,
  ) {
    listener?.endFunctionName(beginToken, token, isFunctionExpression);
  }

  @override
  void endFunctionType(Token functionToken, Token? questionMark) {
    listener?.endFunctionType(functionToken, questionMark);
  }

  @override
  void endTypedef(
    Token? augmentToken,
    Token typedefKeyword,
    Token? equals,
    Token endToken,
  ) {
    listener?.endTypedef(augmentToken, typedefKeyword, equals, endToken);
  }

  @override
  void endFunctionTypedFormalParameter(Token nameToken, Token? question) {
    listener?.endFunctionTypedFormalParameter(nameToken, question);
  }

  @override
  void handleTypeArgumentApplication(Token openAngleBracket) {
    listener?.handleTypeArgumentApplication(openAngleBracket);
  }

  @override
  void endHide(Token hideKeyword) {
    listener?.endHide(hideKeyword);
  }

  @override
  void endIfControlFlow(Token token) {
    listener?.endIfControlFlow(token);
  }

  @override
  void endIfElseControlFlow(Token token) {
    listener?.endIfElseControlFlow(token);
  }

  @override
  void endIfStatement(Token ifToken, Token? elseToken, Token endToken) {
    listener?.endIfStatement(ifToken, elseToken, endToken);
  }

  @override
  void endImplicitCreationExpression(Token token, Token openAngleBracket) {
    listener?.endImplicitCreationExpression(token, openAngleBracket);
  }

  @override
  void endImport(Token importKeyword, Token? augmentToken, Token? semicolon) {
    listener?.endImport(importKeyword, augmentToken, semicolon);
  }

  @override
  void endInitializedIdentifier(Token nameToken) {
    listener?.endInitializedIdentifier(nameToken);
  }

  @override
  void endInitializer(Token endToken) {
    listener?.endInitializer(endToken);
  }

  @override
  void endInitializers(int count, Token beginToken, Token endToken) {
    listener?.endInitializers(count, beginToken, endToken);
  }

  @override
  void endInvalidAwaitExpression(
    Token beginToken,
    Token endToken,
    MessageCode errorCode,
  ) {
    listener?.endInvalidAwaitExpression(beginToken, endToken, errorCode);
  }

  @override
  void endInvalidYieldStatement(
    Token beginToken,
    Token? starToken,
    Token endToken,
    MessageCode errorCode,
  ) {
    listener?.endInvalidYieldStatement(
      beginToken,
      starToken,
      endToken,
      errorCode,
    );
  }

  @override
  void endLabeledStatement(int labelCount) {
    listener?.endLabeledStatement(labelCount);
  }

  @override
  void endLibraryName(Token libraryKeyword, Token semicolon, bool hasName) {
    listener?.endLibraryName(libraryKeyword, semicolon, hasName);
  }

  @override
  void endLiteralString(int interpolationCount, Token endToken) {
    listener?.endLiteralString(interpolationCount, endToken);
  }

  @override
  void endLiteralSymbol(Token hashToken, int identifierCount) {
    listener?.endLiteralSymbol(hashToken, identifierCount);
  }

  @override
  void endLocalFunctionDeclaration(Token endToken) {
    listener?.endLocalFunctionDeclaration(endToken);
  }

  @override
  void endMember() {
    listener?.endMember();
  }

  @override
  void endMetadata(Token beginToken, Token? periodBeforeName, Token endToken) {
    listener?.endMetadata(beginToken, periodBeforeName, endToken);
  }

  @override
  void endMetadataStar(int count) {
    listener?.endMetadataStar(count);
  }

  @override
  void endMixinDeclaration(Token beginToken, Token endToken) {
    listener?.endMixinDeclaration(beginToken, endToken);
  }

  @override
  void endNamedFunctionExpression(Token endToken) {
    listener?.endNamedFunctionExpression(endToken);
  }

  @override
  void endNamedMixinApplication(
    Token begin,
    Token classKeyword,
    Token equals,
    Token? implementsKeyword,
    Token endToken,
  ) {
    listener?.endNamedMixinApplication(
      begin,
      classKeyword,
      equals,
      implementsKeyword,
      endToken,
    );
  }

  @override
  void endNewExpression(Token token) {
    listener?.endNewExpression(token);
  }

  @override
  void endOptionalFormalParameters(
    int count,
    Token beginToken,
    Token endToken,
    MemberKind kind,
  ) {
    listener?.endOptionalFormalParameters(count, beginToken, endToken, kind);
  }

  @override
  void endPart(Token partKeyword, Token semicolon) {
    listener?.endPart(partKeyword, semicolon);
  }

  @override
  void endPartOf(
    Token partKeyword,
    Token ofKeyword,
    Token semicolon,
    bool hasName,
  ) {
    listener?.endPartOf(partKeyword, ofKeyword, semicolon, hasName);
  }

  @override
  void endRedirectingFactoryBody(Token beginToken, Token endToken) {
    listener?.endRedirectingFactoryBody(beginToken, endToken);
  }

  @override
  void endRethrowStatement(Token rethrowToken, Token endToken) {
    listener?.endRethrowStatement(rethrowToken, endToken);
  }

  @override
  void endReturnStatement(
    bool hasExpression,
    Token beginToken,
    Token endToken,
  ) {
    listener?.endReturnStatement(hasExpression, beginToken, endToken);
  }

  @override
  void endShow(Token showKeyword) {
    listener?.endShow(showKeyword);
  }

  @override
  void endSwitchBlock(int caseCount, Token beginToken, Token endToken) {
    listener?.endSwitchBlock(caseCount, beginToken, endToken);
  }

  @override
  void endSwitchExpressionBlock(
    int caseCount,
    Token beginToken,
    Token endToken,
  ) {
    listener?.endSwitchExpressionBlock(caseCount, beginToken, endToken);
  }

  @override
  void endSwitchCase(
    int labelCount,
    int expressionCount,
    Token? defaultKeyword,
    Token? colonAfterDefault,
    int statementCount,
    Token beginToken,
    Token endToken,
  ) {
    listener?.endSwitchCase(
      labelCount,
      expressionCount,
      defaultKeyword,
      colonAfterDefault,
      statementCount,
      beginToken,
      endToken,
    );
  }

  @override
  void endSwitchExpressionCase(
    Token beginToken,
    Token? when,
    Token arrow,
    Token endToken,
  ) {
    listener?.endSwitchExpressionCase(beginToken, when, arrow, endToken);
  }

  @override
  void endSwitchStatement(Token switchKeyword, Token endToken) {
    listener?.endSwitchStatement(switchKeyword, endToken);
  }

  @override
  void endSwitchExpression(Token switchKeyword, Token endToken) {
    listener?.endSwitchExpression(switchKeyword, endToken);
  }

  @override
  void endThenStatement(Token beginToken, Token endToken) {
    listener?.endThenStatement(beginToken, endToken);
  }

  @override
  void endTopLevelDeclaration(Token endToken) {
    listener?.endTopLevelDeclaration(endToken);
  }

  @override
  void beginFields(
    DeclarationKind declarationKind,
    Token? abstractToken,
    Token? augmentToken,
    Token? externalToken,
    Token? staticToken,
    Token? covariantToken,
    Token? lateToken,
    Token? varFinalOrConst,
    Token lastConsumed,
  ) {
    listener?.beginFields(
      declarationKind,
      abstractToken,
      augmentToken,
      externalToken,
      staticToken,
      covariantToken,
      lateToken,
      varFinalOrConst,
      lastConsumed,
    );
  }

  @override
  void endTopLevelFields(
    Token? augmentToken,
    Token? externalToken,
    Token? staticToken,
    Token? covariantToken,
    Token? lateToken,
    Token? varFinalOrConst,
    int count,
    Token beginToken,
    Token endToken,
  ) {
    listener?.endTopLevelFields(
      augmentToken,
      externalToken,
      staticToken,
      covariantToken,
      lateToken,
      varFinalOrConst,
      count,
      beginToken,
      endToken,
    );
  }

  @override
  void endTopLevelMethod(Token beginToken, Token? getOrSet, Token endToken) {
    listener?.endTopLevelMethod(beginToken, getOrSet, endToken);
  }

  @override
  void endTryStatement(
    int catchCount,
    Token tryKeyword,
    Token? finallyKeyword,
    Token endToken,
  ) {
    listener?.endTryStatement(catchCount, tryKeyword, finallyKeyword, endToken);
  }

  @override
  void endTypeArguments(int count, Token beginToken, Token endToken) {
    listener?.endTypeArguments(count, beginToken, endToken);
  }

  @override
  void endTypeList(int count) {
    listener?.endTypeList(count);
  }

  @override
  void endTypeVariable(
    Token token,
    int index,
    Token? extendsOrSuper,
    Token? variance,
  ) {
    listener?.endTypeVariable(token, index, extendsOrSuper, variance);
  }

  @override
  void endTypeVariables(Token beginToken, Token endToken) {
    listener?.endTypeVariables(beginToken, endToken);
  }

  @override
  void endVariableInitializer(Token assignmentOperator) {
    listener?.endVariableInitializer(assignmentOperator);
  }

  @override
  void endVariablesDeclaration(int count, Token? endToken) {
    listener?.endVariablesDeclaration(count, endToken);
  }

  @override
  void endWhileStatement(Token whileKeyword, Token endToken) {
    listener?.endWhileStatement(whileKeyword, endToken);
  }

  @override
  void endWhileStatementBody(Token endToken) {
    listener?.endWhileStatementBody(endToken);
  }

  @override
  void endYieldStatement(Token yieldToken, Token? starToken, Token endToken) {
    listener?.endYieldStatement(yieldToken, starToken, endToken);
  }

  @override
  void beginAsOperatorType(Token operator) {
    listener?.beginAsOperatorType(operator);
  }

  @override
  void endAsOperatorType(Token operator) {
    listener?.endAsOperatorType(operator);
  }

  @override
  void handleAsOperator(Token operator) {
    listener?.handleAsOperator(operator);
  }

  @override
  void handleCastPattern(Token operator) {
    listener?.handleCastPattern(operator);
  }

  @override
  void handleAssignmentExpression(Token token, Token endToken) {
    listener?.handleAssignmentExpression(token, endToken);
  }

  @override
  void endAnonymousMethodInvocation(
    Token beginToken,
    Token? functionDefinition,
    Token endToken, {
    required bool isExpression,
  }) {
    listener?.endAnonymousMethodInvocation(
      beginToken,
      functionDefinition,
      endToken,
      isExpression: isExpression,
    );
  }

  @override
  void handleImplicitFormalParameters(Token token) {
    listener?.handleImplicitFormalParameters(token);
  }

  @override
  void handleAsyncModifier(Token? asyncToken, Token? starToken) {
    listener?.handleAsyncModifier(asyncToken, starToken);
  }

  @override
  void handleBreakStatement(
    bool hasTarget,
    Token breakKeyword,
    Token endToken,
  ) {
    listener?.handleBreakStatement(hasTarget, breakKeyword, endToken);
  }

  @override
  void handleCatchBlock(Token? onKeyword, Token? catchKeyword, Token? comma) {
    listener?.handleCatchBlock(onKeyword, catchKeyword, comma);
  }

  @override
  void handleClassExtends(Token? extendsKeyword, int typeCount) {
    listener?.handleClassExtends(extendsKeyword, typeCount);
  }

  @override
  void handleClassHeader(Token begin, Token classKeyword, Token? nativeToken) {
    listener?.handleClassHeader(begin, classKeyword, nativeToken);
  }

  @override
  void handleClassNoWithClause() {
    listener?.handleClassNoWithClause();
  }

  @override
  void handleEnumNoWithClause() {
    listener?.handleEnumNoWithClause();
  }

  @override
  void handleImplements(Token? implementsKeyword, int interfacesCount) {
    listener?.handleImplements(implementsKeyword, interfacesCount);
  }

  @override
  void handleClassWithClause(Token withKeyword) {
    listener?.handleClassWithClause(withKeyword);
  }

  @override
  void handleEnumWithClause(Token withKeyword) {
    listener?.handleEnumWithClause(withKeyword);
  }

  @override
  void handleMixinWithClause(Token withKeyword) {
    listener?.handleMixinWithClause(withKeyword);
  }

  @override
  void handleConditionalExpressionColon() {
    listener?.handleConditionalExpressionColon();
  }

  @override
  void handleConstFactory(Token constKeyword) {
    listener?.handleConstFactory(constKeyword);
  }

  @override
  void handleContinueStatement(
    bool hasTarget,
    Token continueKeyword,
    Token endToken,
  ) {
    listener?.handleContinueStatement(hasTarget, continueKeyword, endToken);
  }

  @override
  void handleDirectivesOnly() {
    listener?.handleDirectivesOnly();
  }

  @override
  void handleDottedName(int count, Token firstIdentifier) {
    listener?.handleDottedName(count, firstIdentifier);
  }

  @override
  void handleElseControlFlow(Token elseToken) {
    listener?.handleElseControlFlow(elseToken);
  }

  @override
  void handleEmptyFunctionBody(Token semicolon) {
    listener?.handleEmptyFunctionBody(semicolon);
  }

  @override
  void handleEmptyStatement(Token token) {
    listener?.handleEmptyStatement(token);
  }

  @override
  void handleErrorToken(ErrorToken token) {
    listener?.handleErrorToken(token);
  }

  @override
  void handleExpressionFunctionBody(Token arrowToken, Token? endToken) {
    listener?.handleExpressionFunctionBody(arrowToken, endToken);
  }

  @override
  void handleExpressionStatement(Token beginToken, Token endToken) {
    listener?.handleExpressionStatement(beginToken, endToken);
  }

  @override
  void handleExtraneousExpression(Token token, Message message) {
    listener?.handleExtraneousExpression(token, message);
  }

  @override
  void handleFinallyBlock(Token finallyKeyword) {
    listener?.handleFinallyBlock(finallyKeyword);
  }

  @override
  void handleForInitializerEmptyStatement(Token token) {
    listener?.handleForInitializerEmptyStatement(token);
  }

  @override
  void handleForInitializerExpressionStatement(Token token, bool forIn) {
    listener?.handleForInitializerExpressionStatement(token, forIn);
  }

  @override
  void handleForInitializerLocalVariableDeclaration(Token token, bool forIn) {
    listener?.handleForInitializerLocalVariableDeclaration(token, forIn);
  }

  @override
  void handleForInitializerPatternVariableAssignment(
    Token keyword,
    Token equals,
  ) {
    listener?.handleForInitializerPatternVariableAssignment(keyword, equals);
  }

  @override
  void handleForInLoopParts(
    Token? awaitToken,
    Token forToken,
    Token leftParenthesis,
    Token? patternKeyword,
    Token inKeyword,
  ) {
    listener?.handleForInLoopParts(
      awaitToken,
      forToken,
      leftParenthesis,
      patternKeyword,
      inKeyword,
    );
  }

  @override
  void handleForLoopParts(
    Token forKeyword,
    Token leftParen,
    Token leftSeparator,
    Token rightSeparator,
    int updateExpressionCount,
  ) {
    listener?.handleForLoopParts(
      forKeyword,
      leftParen,
      leftSeparator,
      rightSeparator,
      updateExpressionCount,
    );
  }

  @override
  void handleFormalParameterWithoutValue(Token token) {
    listener?.handleFormalParameterWithoutValue(token);
  }

  @override
  void handleFunctionBodySkipped(Token token, bool isExpressionBody) {
    listener?.handleFunctionBodySkipped(token, isExpressionBody);
  }

  @override
  void handleIdentifier(Token token, IdentifierContext context) {
    listener?.handleIdentifier(token, context);
  }

  @override
  void handleIdentifierList(int count) {
    listener?.handleIdentifierList(count);
  }

  @override
  void handleImportPrefix(Token? deferredKeyword, Token? asKeyword) {
    listener?.handleImportPrefix(deferredKeyword, asKeyword);
  }

  @override
  void handleIndexedExpression(
    Token? question,
    Token openSquareBracket,
    Token closeSquareBracket,
  ) {
    listener?.handleIndexedExpression(
      question,
      openSquareBracket,
      closeSquareBracket,
    );
  }

  @override
  void handleInterpolationExpression(Token leftBracket, Token? rightBracket) {
    listener?.handleInterpolationExpression(leftBracket, rightBracket);
  }

  @override
  void handleInvalidExpression(Token token) {
    listener?.handleInvalidExpression(token);
  }

  @override
  void handleInvalidFunctionBody(Token token) {
    listener?.handleInvalidFunctionBody(token);
  }

  @override
  void handleInvalidMember(Token endToken) {
    listener?.handleInvalidMember(endToken);
  }

  @override
  void handleInvalidOperatorName(Token operatorKeyword, Token token) {
    listener?.handleInvalidOperatorName(operatorKeyword, token);
  }

  @override
  void handleInvalidStatement(Token token, Message message) {
    listener?.handleInvalidStatement(token, message);
  }

  @override
  void handleInvalidTopLevelBlock(Token token) {
    listener?.handleInvalidTopLevelBlock(token);
  }

  @override
  void handleInvalidTopLevelDeclaration(Token endToken) {
    listener?.handleInvalidTopLevelDeclaration(endToken);
  }

  @override
  void handleInvalidTypeArguments(Token token) {
    listener?.handleInvalidTypeArguments(token);
  }

  @override
  void handleInvalidTypeReference(Token token) {
    listener?.handleInvalidTypeReference(token);
  }

  @override
  void beginIsOperatorType(Token operator) {
    listener?.beginIsOperatorType(operator);
  }

  @override
  void endIsOperatorType(Token operator) {
    listener?.endIsOperatorType(operator);
  }

  @override
  void handleIsOperator(Token isOperator, Token? not) {
    listener?.handleIsOperator(isOperator, not);
  }

  @override
  void handleLabel(Token token) {
    listener?.handleLabel(token);
  }

  @override
  void handleLiteralBool(Token token) {
    listener?.handleLiteralBool(token);
  }

  @override
  void handleLiteralDouble(Token token) {
    listener?.handleLiteralDouble(token);
  }

  @override
  void handleLiteralDoubleWithSeparators(Token token) {
    listener?.handleLiteralDoubleWithSeparators(token);
  }

  @override
  void handleLiteralInt(Token token) {
    listener?.handleLiteralInt(token);
  }

  @override
  void handleLiteralIntWithSeparators(Token token) {
    listener?.handleLiteralIntWithSeparators(token);
  }

  @override
  void handleLiteralList(
    int count,
    Token beginToken,
    Token? constKeyword,
    Token endToken,
  ) {
    listener?.handleLiteralList(count, beginToken, constKeyword, endToken);
  }

  @override
  void handleListPattern(int count, Token beginToken, Token endToken) {
    listener?.handleListPattern(count, beginToken, endToken);
  }

  @override
  void handleLiteralMapEntry(
    Token colon,
    Token endToken, {
    Token? nullAwareKeyToken,
    Token? nullAwareValueToken,
  }) {
    listener?.handleLiteralMapEntry(
      colon,
      endToken,
      nullAwareKeyToken: nullAwareKeyToken,
      nullAwareValueToken: nullAwareValueToken,
    );
  }

  @override
  void handleMapPatternEntry(Token colon, Token endToken) {
    listener?.handleMapPatternEntry(colon, endToken);
  }

  @override
  void handleLiteralNull(Token token) {
    listener?.handleLiteralNull(token);
  }

  @override
  void handleLiteralSetOrMap(
    int count,
    Token leftBrace,
    Token? constKeyword,
    Token rightBrace,
    // TODO(danrubel): hasSetEntry parameter exists for replicating existing
    // behavior and will be removed once unified collection has been enabled
    bool hasSetEntry,
  ) {
    listener?.handleLiteralSetOrMap(
      count,
      leftBrace,
      constKeyword,
      rightBrace,
      hasSetEntry,
    );
  }

  @override
  void handleMapPattern(int count, Token leftBrace, Token rightBrace) {
    listener?.handleMapPattern(count, leftBrace, rightBrace);
  }

  @override
  void handleMixinHeader(Token mixinKeyword) {
    listener?.handleMixinHeader(mixinKeyword);
  }

  @override
  void handleMixinOn(Token? onKeyword, int typeCount) {
    listener?.handleMixinOn(onKeyword, typeCount);
  }

  @override
  void handleNamedArgument(Token colon) {
    listener?.handleNamedArgument(colon);
  }

  @override
  void handlePatternField(Token? colon) {
    listener?.handlePatternField(colon);
  }

  @override
  void handleNamedRecordField(Token colon) {
    listener?.handleNamedRecordField(colon);
  }

  @override
  void handleNamedMixinApplicationWithClause(Token withKeyword) {
    listener?.handleNamedMixinApplicationWithClause(withKeyword);
  }

  @override
  void handleNativeClause(Token nativeToken, bool hasName) {
    listener?.handleNativeClause(nativeToken, hasName);
  }

  @override
  void handleNativeFunctionBody(Token nativeToken, Token semicolon) {
    listener?.handleNativeFunctionBody(nativeToken, semicolon);
  }

  @override
  void handleNativeFunctionBodyIgnored(Token nativeToken, Token semicolon) {
    listener?.handleNativeFunctionBodyIgnored(nativeToken, semicolon);
  }

  @override
  void handleNativeFunctionBodySkipped(Token nativeToken, Token semicolon) {
    listener?.handleNativeFunctionBodySkipped(nativeToken, semicolon);
  }

  @override
  void handleNewAsIdentifier(Token token) {
    listener?.handleNewAsIdentifier(token);
  }

  @override
  void handleNoArguments(Token token) {
    listener?.handleNoArguments(token);
  }

  @override
  void handleNoClassBody(Token semicolonToken) {
    listener?.handleNoClassBody(semicolonToken);
  }

  @override
  void handleNoConstructorReferenceContinuationAfterTypeArguments(Token token) {
    listener?.handleNoConstructorReferenceContinuationAfterTypeArguments(token);
  }

  @override
  void handleNoExtensionTypeBody(Token semicolonToken) {
    listener?.handleNoExtensionTypeBody(semicolonToken);
  }

  @override
  void handleNoFieldInitializer(Token token) {
    listener?.handleNoFieldInitializer(token);
  }

  @override
  void handleNoFormalParameters(Token token, MemberKind kind) {
    listener?.handleNoFormalParameters(token, kind);
  }

  @override
  void handleNoFunctionBody(Token token) {
    listener?.handleNoFunctionBody(token);
  }

  @override
  void handleNoInitializers() {
    listener?.handleNoInitializers();
  }

  @override
  void handleNoName(Token token) {
    listener?.handleNoName(token);
  }

  @override
  void handleNonNullAssertExpression(Token bang) {
    listener?.handleNonNullAssertExpression(bang);
  }

  @override
  void handleNullAssertPattern(Token bang) {
    listener?.handleNullAssertPattern(bang);
  }

  @override
  void handleNullCheckPattern(Token question) {
    listener?.handleNullCheckPattern(question);
  }

  @override
  void handleAssignedVariablePattern(Token variable) {
    listener?.handleAssignedVariablePattern(variable);
  }

  @override
  void handleDeclaredVariablePattern(
    Token? keyword,
    Token variable, {
    required bool inAssignmentPattern,
  }) {
    listener?.handleDeclaredVariablePattern(
      keyword,
      variable,
      inAssignmentPattern: inAssignmentPattern,
    );
  }

  @override
  void handleWildcardPattern(Token? keyword, Token wildcard) {
    listener?.handleWildcardPattern(keyword, wildcard);
  }

  @override
  void handleNoIdentifier(Token token, IdentifierContext identifierContext) {
    listener?.handleNoIdentifier(token, identifierContext);
  }

  @override
  void handleNoType(Token lastConsumed) {
    listener?.handleNoType(lastConsumed);
  }

  @override
  void handleNoTypeArguments(Token token) {
    listener?.handleNoTypeArguments(token);
  }

  @override
  void handleNoTypeNameInConstructorReference(Token token) {
    listener?.handleNoTypeNameInConstructorReference(token);
  }

  @override
  void handleNoTypeVariables(Token token) {
    listener?.handleNoTypeVariables(token);
  }

  @override
  void handleNoVariableInitializer(Token token) {
    listener?.handleNoVariableInitializer(token);
  }

  @override
  void handleOperator(Token token) {
    listener?.handleOperator(token);
  }

  @override
  void handleOperatorName(Token operatorKeyword, Token token) {
    listener?.handleOperatorName(operatorKeyword, token);
  }

  @override
  void handleParenthesizedCondition(Token token, Token? case_, Token? when) {
    listener?.handleParenthesizedCondition(token, case_, when);
  }

  @override
  void beginPattern(Token token) {
    listener?.beginPattern(token);
  }

  @override
  void beginPatternGuard(Token when) {
    listener?.beginPatternGuard(when);
  }

  @override
  void beginParenthesizedExpressionOrRecordLiteral(Token token) {
    listener?.beginParenthesizedExpressionOrRecordLiteral(token);
  }

  @override
  void beginSwitchCaseWhenClause(Token when) {
    listener?.beginSwitchCaseWhenClause(when);
  }

  @override
  void endRecordLiteral(Token token, int count, Token? constKeyword) {
    listener?.endRecordLiteral(token, count, constKeyword);
  }

  @override
  void handleRecordPattern(Token token, int count) {
    listener?.handleRecordPattern(token, count);
  }

  @override
  void endPattern(Token token) {
    listener?.endPattern(token);
  }

  @override
  void endPatternGuard(Token token) {
    listener?.endPatternGuard(token);
  }

  @override
  void endParenthesizedExpression(Token token) {
    listener?.endParenthesizedExpression(token);
  }

  @override
  void endSwitchCaseWhenClause(Token token) {
    listener?.endSwitchCaseWhenClause(token);
  }

  @override
  void handleParenthesizedPattern(Token token) {
    listener?.handleParenthesizedPattern(token);
  }

  @override
  void beginConstantPattern(Token? constKeyword) {
    listener?.beginConstantPattern(constKeyword);
  }

  @override
  void endConstantPattern(Token? constKeyword) {
    listener?.endConstantPattern(constKeyword);
  }

  @override
  void handleNullAwareElement(Token nullAwareToken) {
    listener?.handleNullAwareElement(nullAwareToken);
  }

  @override
  void handleObjectPattern(
    Token firstIdentifier,
    Token? dot,
    Token? secondIdentifier,
  ) {
    listener?.handleObjectPattern(firstIdentifier, dot, secondIdentifier);
  }

  @override
  void handleQualified(Token period) {
    listener?.handleQualified(period);
  }

  @override
  void handleRecoverableError(
    Message message,
    Token startToken,
    Token endToken,
  ) {
    if (forwardErrors) {
      listener?.handleRecoverableError(message, startToken, endToken);
    }
  }

  @override
  void handleRecoverDeclarationHeader(DeclarationHeaderKind kind) {
    listener?.handleRecoverDeclarationHeader(kind);
  }

  @override
  void handleRecoverImport(Token? semicolon) {
    listener?.handleRecoverImport(semicolon);
  }

  @override
  void handleRecoverMixinHeader() {
    listener?.handleRecoverMixinHeader();
  }

  @override
  void handleScript(Token token) {
    listener?.handleScript(token);
  }

  @override
  void handleSend(Token beginToken, Token endToken) {
    listener?.handleSend(beginToken, endToken);
  }

  @override
  void handleSpreadExpression(Token spreadToken) {
    listener?.handleSpreadExpression(spreadToken);
  }

  @override
  void handleRestPattern(Token dots, {required bool hasSubPattern}) {
    listener?.handleRestPattern(dots, hasSubPattern: hasSubPattern);
  }

  @override
  void handleAdjacentStringLiterals(Token startToken, int literalCount) {
    listener?.handleAdjacentStringLiterals(startToken, literalCount);
  }

  @override
  void handleStringPart(Token token) {
    listener?.handleStringPart(token);
  }

  @override
  void handleSuperExpression(Token token, IdentifierContext context) {
    listener?.handleSuperExpression(token, context);
  }

  @override
  void handleAugmentSuperExpression(
    Token augmentToken,
    Token superToken,
    IdentifierContext context,
  ) {
    listener?.handleAugmentSuperExpression(augmentToken, superToken, context);
  }

  @override
  void handleSwitchCaseNoWhenClause(Token token) {
    listener?.handleSwitchCaseNoWhenClause(token);
  }

  @override
  void handleSwitchExpressionCasePattern(Token token) {
    listener?.handleSwitchExpressionCasePattern(token);
  }

  @override
  void handleSymbolVoid(Token token) {
    listener?.handleSymbolVoid(token);
  }

  @override
  void handleThisExpression(Token token, IdentifierContext context) {
    listener?.handleThisExpression(token, context);
  }

  @override
  void handleThrowExpression(Token throwToken, Token endToken) {
    listener?.handleThrowExpression(throwToken, endToken);
  }

  @override
  void handleType(Token beginToken, Token? questionMark) {
    listener?.handleType(beginToken, questionMark);
  }

  @override
  void handleTypeVariablesDefined(Token token, int count) {
    listener?.handleTypeVariablesDefined(token, count);
  }

  @override
  void handleUnaryPostfixAssignmentExpression(Token token) {
    listener?.handleUnaryPostfixAssignmentExpression(token);
  }

  @override
  void handleUnaryPrefixAssignmentExpression(Token token) {
    listener?.handleUnaryPrefixAssignmentExpression(token);
  }

  @override
  void handleUnaryPrefixExpression(Token token) {
    listener?.handleUnaryPrefixExpression(token);
  }

  @override
  void handleRelationalPattern(Token token) {
    listener?.handleRelationalPattern(token);
  }

  @override
  void handleUnescapeError(
    Message message,
    Token location,
    int offset,
    int length,
  ) {
    listener?.handleUnescapeError(message, location, offset, length);
  }

  @override
  void handleValuedFormalParameter(
    Token equals,
    Token token,
    FormalParameterKind kind,
  ) {
    listener?.handleValuedFormalParameter(equals, token, kind);
  }

  @override
  void handleVoidKeyword(Token token) {
    listener?.handleVoidKeyword(token);
  }

  @override
  void handleVoidKeywordWithTypeArguments(Token token) {
    listener?.handleVoidKeywordWithTypeArguments(token);
  }

  @override
  void handlePatternVariableDeclarationStatement(
    Token keyword,
    Token equals,
    Token semicolon,
  ) {
    listener?.handlePatternVariableDeclarationStatement(
      keyword,
      equals,
      semicolon,
    );
  }

  @override
  void handlePatternAssignment(Token equals) {
    listener?.handlePatternAssignment(equals);
  }

  @override
  void logEvent(String name) {
    listener?.logEvent(name);
  }

  @override
  void reportVarianceModifierNotEnabled(Token? variance) {
    listener?.reportVarianceModifierNotEnabled(variance);
  }

  @override
  void handleExperimentNotEnabled(
    ExperimentalFlag experimentalFlag,
    Token startToken,
    Token endToken,
  ) {
    listener?.handleExperimentNotEnabled(
      experimentalFlag,
      startToken,
      endToken,
    );
  }

  @override
  void beginExtensionTypeDeclaration(
    Token? augmentToken,
    Token extensionKeyword,
    Token name,
  ) {
    listener?.beginExtensionTypeDeclaration(
      augmentToken,
      extensionKeyword,
      name,
    );
  }

  @override
  void endExtensionTypeDeclaration(
    Token beginToken,
    Token? augmentToken,
    Token extensionKeyword,
    Token typeKeyword,
    Token endToken,
  ) {
    listener?.endExtensionTypeDeclaration(
      beginToken,
      augmentToken,
      extensionKeyword,
      typeKeyword,
      endToken,
    );
  }

  @override
  void beginPrimaryConstructor(Token beginToken) {
    listener?.beginPrimaryConstructor(beginToken);
  }

  @override
  void endPrimaryConstructor(
    Token beginToken,
    Token? constKeyword,
    bool hasConstructorName,
    bool forExtensionType,
  ) {
    listener?.endPrimaryConstructor(
      beginToken,
      constKeyword,
      hasConstructorName,
      forExtensionType,
    );
  }

  @override
  void handleNoPrimaryConstructor(
    Token token,
    Token? constKeyword,
    bool forExtensionType,
  ) {
    listener?.handleNoPrimaryConstructor(token, constKeyword, forExtensionType);
  }

  @override
  void handleDotShorthandHead(Token token) {
    listener?.handleDotShorthandHead(token);
  }

  @override
  void handleDotShorthandContext(Token token) {
    listener?.handleDotShorthandContext(token);
  }

  @override
  void beginConstDotShorthand(Token token) {
    listener?.beginConstDotShorthand(token);
  }

  @override
  void endConstDotShorthand(Token token) {
    listener?.beginConstDotShorthand(token);
  }

  @override
  void beginPrimaryConstructorBody(Token token) {
    listener?.beginPrimaryConstructorBody(token);
  }

  @override
  void endPrimaryConstructorBody(
    Token beginToken,
    Token? beginInitializers,
    Token endToken,
  ) {
    listener?.endPrimaryConstructorBody(
      beginToken,
      beginInitializers,
      endToken,
    );
  }
}

class NullListener extends ForwardingListener {
  bool hasErrors = false;

  @override
  void handleRecoverableError(
    Message message,
    Token startToken,
    Token endToken,
  ) {
    hasErrors = true;
  }
}
